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You are here: Home / Applications / Materail Processing / 1030nm laser for material processing

Thin-disc Yb:YAG lasers have many advantages compared with diode-pumped rod-based Nd:YAG systems,such as superior beam quality, efficiency and tunability. Yb:YAG is a quasi-three-level structure crystal with low quantum of loss, thermal load, very low thermal permeability, easy to obtain high output, and can output a maximum of 100W at 1030nm,ensuring the output mode is TEM00.Thin-disc Yb:YAG lasers are aiming for the engraving and printing markets.

Theotry

1030nm laser for material processing(Yb:YAG Laser Crystal)

The main components of device are:

Gain medium - Nd YAG

Thin disk made of Yb:YAG. The crystal shape of the thin disk laser is a sheet type.The entire crystal of thin disk is bonded to the heat sink, so the cooling efficiency of the crystal is very high. Becasue the thickness of the crystal is very thin, only a part of the pump light is absorbed by the crystals every time while it passes through the laser crystals. In order to improve its pumping efficiency, a parabolic mirror is placed at the front of the semiconductor to produce output light with high power.

Heat sink——Used for cooling crystals

Thin disk——Made of Yb:YAG

Contact material——Contact thin disk with heat sink

Pump light——Provide energy

Parabolic mirror——Improve pumping efficiency

Optical fiber

Etalon——Produce single frequency

Filter——Tuning wavelength

Feature

  • High quantum efficiency
  • Low heat transfer efficiency to pump light
  • High thermal conductivity

Application

  • Welding high strength steels

The disk Yb:YAG laser at 1030nm with powers at 2~8 kW have extremely good beam quality compared with many other industrial lasers for welding. Yb:YAG is usually used laser medium for thin disk lasers because it has radiative lifetime and high thermal conductivity and good mechanical properties. What’s more, according to absorptivity research of materials,the disk lasers have more advantages than CO2 lasers and Nd:YAG lasers.

Reader Interactions

Comments

  1. YiHong says

    December 31, 2019 at 00:42

    Hello crylink, I would like to ask if you can such Yb:YAG thin disk (130um-300 um) with AR and HR coating ? what about the LIDT of the disk? If it is possible, would you please make a sample for test?

    Thanks and waiting for your reply.

    YiHong

    Reply

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